Two teenagers charged in connection with Nevada wildfire

NEW: Investigators says the juveniles started a fire they failed to extinguish

NEW: Two firefighters suffer non-life-threatening injuries

(CNN) -- Two teenagers have been charged with arson in connection with a wildfire that prompted evacuations and forced the closure of a Nevada highway, authorities said Wednesday.

Two 15-year-old males were arrested Wednesday, said a statement from fire information officer Rita Ayers. Investigators said the juveniles built a "fort" in the area and started a campfire that they failed to extinguish. Wind caused the fire to spread.

Two firefighters were injured fighting the Ray May fire, but their injuries are not life-threatening.

The juveniles have been charged with third-degree arson.

The blaze began Tuesday afternoonnear Gardnerville. It has burned at least one structure, said Capt Terry Taylor of Douglas County's Nevada Fire Department.